Why form_for use incorrect REST url_helpers for namespaced controller?

In my rails app have a partial that contains a form shared between the new and edit action:

<%= form_for @customer do |f| %>

....

<% end %>

These action are of a controller (called customers) namespaced (cal开发者_StackOverflowled admin), if try to run the code show the error when execute form_for:

undefined method `customer_path'

Have resolved this using:

<%= form_for :customer, @customer do |f| %>

....

<% end %>

Now the form is generated with correct url when is called by new action but when generated by edit the form url is "/admin/customers/1/edit" instead of update. If submit the form show the error:

No route matches "/admin/customers/1/edit"

but in routes.rb have:

namespace :admin do

resources :customers

end

and rake:routes show all the REST urls:

admin_customers GET /admin/customers(.:format) {:action=>"index", :controller=>"admin/customers"} POST /admin/customers(.:format) {:action=>"create", :controller=>"admin/customers"} new_admin_customer GET /admin/customers/new(.:format) {:action=>"new", :controller=>"admin/customers"} edit_admin_customer GET/admin/customers/:id/edit(.:format){:action=>"edit",:controller=>"admin/customers"} admin_customer GET /admin/customers/:id(.:format) {:action=>"show",:controller=>"admin/customers"} PUT /admin/customers/:id(.:format) {:action=>"update", :controller=>"admin/customers"} DELETE /admin/customers/:id(.:format) {:action=>"destroy",:controller=>"admin/customers"}

Any idea?

Try this

<%= form_for [:admin, @customer] do |f| %>